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pav-90 [236]
3 years ago
15

There are 35 competitors in a marathon. Sixty percent of these finished the race in under four hrs. How many did not?

Mathematics
1 answer:
Nikitich [7]3 years ago
7 0

Answer:

14 did not finish under 4 hours.

Step-by-step explanation:

Givens

Total number of competitors = 35

% who finish under 4 hours = 60%

Formula

Those who did not = 35 - 60%*35

Solution

Those who did finish under 4 hours = 35 * 60%

Those who did finish under 4 hours = 35*60/100 = 2100/100

Those who did finish under 4 hours = 21

Those who did not = 35 - 35*60/100

Those who did not = 35 - 21

Those who did not = 14

====================

There is another way to do this. Realize that 40% did not finish the race in under 4 hours.

Those who did not finish in under 4 hours = 35*40/100 = 1400 / 100 = 14

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I will give u 5 stars for you answer and ill mark u brainilest if u tell me how to do it.
kolezko [41]

Answer:

Erin ran 12.5 miles

Luis ran 7.5

In all they ran 20 miles.

Step-by-step explanation:

Erin: 5 x 3.5 = ?

Luis: 3 x 2.5 = ?

----------------------------

5 x 2.5 = 12.5 . Erin ran 12.5 miles

3 x 2.5 = 7.5 .  Luis ran 7.5 miles

7.5 + 12.5 = 20 miles

They ran 20 miles all together.

Hope this helps!

3 0
3 years ago
Three times the difference of a number and seven is negative three. Fi<br> nd the number.
postnew [5]
3(x-7)=-3
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3 years ago
A quadratic equation of the form 0=ax^2+bx+c has a discriminant value of -16. How many real number solutions does the equation h
harina [27]

None

If the discriminant b² - 4ac < 0

There are no real solutions


5 0
3 years ago
I need help please!?!!!
11111nata11111 [884]
8(p-2) = 32
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3 years ago
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